An Utilities Industry ETF, or exchange-traded fund, is a type of investment fund that holds a diversified portfolio of stocks in the utilities sector. The utilities sector includes companies involved in the production and distribution of electricity, natural gas, and water.An ETF allows an investor to invest in a broad range of utilities companies with a single purchase, providing exposure to the performance of the sector as a whole. The value of the ETF is tied to the performance of the underlying stocks in the portfolio and can be bought or sold on stock exchanges like individual stocks.